Teacher’s Note: Place the objects on a table as given in the picture and fix a cardboard behind the objects. Now glow a torch light from the front side of the objects horizontally and make students see the images of the objects on the cardboard.

__Identification of 2D shapes and 3D objects__

__Travel Through__

**Teacher’s Note****:** Place the objects on a table as given in the picture and fix a
cardboard behind the objects. Now glow a torch light from the front side of the
objects horizontally and make students see the images of the objects on the
cardboard.

__Learn__

**2D impressions of 3D**

Take
an inkpad.

Press
an eraser on the inkpad.

Remove
the eraser. Press it on white paper and
see the 2D impression.

**Teacher’s Note:** The teacher can explain that various 2D shapes can be
obtained as per the 3D objects used.

__Practice __

Based
on the above activity, fill in the table given below.

**Objects
used : Shapes formed **

Eraser
: **Rectangle**

Sharpener
: **Rectangle**

Dice
: **Square**

Bead
: **Circle**

**Teacher’s Note:** Do the activity by using the objects like pencil,
sharpner, dice, ball, beads etc., Observe the impression.

__Try This __

Draw the outline of the objects using pencil. Remove the objects and write the names of the shapes formed.

__Activity __

__3D figures from 2D
shapes__

Take triangle, rectangle, circle shaped colour papers. Paste it
firmly with a stick and rotate the
stick. Observe the 3D figures formed from 2D shapes.

__Activity __

__3D objects using clay__

Make the sphere into cylinder, cylinder into cuboid and cuboid into cube by following the instructions given.

1. Make balls using clay.

2. Roll the balls on a tray and cut both the edges to form
cylinders.

3. Pat the cylinders to
make cuboids.

4. Pat the cuboids to make cubes.

__Pleasure Time __

Let
us join the dots and draw shapes like cube, cuboid, cone and cylinder.

Tags : Geometry | Term 1 Chapter 1 | 2nd Maths , 2nd Maths : Term 1 Unit 1 : Geometry

Study Material, Lecturing Notes, Assignment, Reference, Wiki description explanation, brief detail

2nd Maths : Term 1 Unit 1 : Geometry : Identification of 2D shapes and 3D objects | Geometry | Term 1 Chapter 1 | 2nd Maths

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